Most runner games feel like shovel-ware these days. This game, however, is not one of those. You did a fantastic job of creating a unique game. The graphics are great. You clearly put a lot of effort into creating an immersive atmosphere. The music is nice and fits perfectly with the game. I also appreciate that you allow the user to mute the sounds and music. The controls are perfect. I with more devs would allow the user choices on what keys to use. The game play was so much fun that I couldn't stop until I beat the game. I appreciated that getting an achievement didn't result in half the screen being covered with a notice like you see in so many games these days.
All in all, I think this is a great example of an indie/casual game whose quality exceeds that of large studios.